Depending on the processed material from each drill must be properly sharpened. To verify the correct angle will help a specially prepared square plate of copper or aluminium with a thickness of 1 mm.
To become operational protractor enough to cut it cut, as shown in the picture: a large cutout at an angle of 120 degrees, the other half is 60 degrees and the surviving corner of a square is 90.
Recommend to read
MINI PLANER
For processing small crafts of wood and plywood a very handy tool may be Rubanchik, which is easy to make yourself. The housing 1 (see Fig.) cut out of copper or bronze with a...
THE ELECTRONICS ON THE MOTORCYCLE
Revved the motor, the motorcycle abruptly jumped up and rushed forward. The neighbouring village was what half a kilometer, as suddenly go haywire motor... to Prevent such surprises...
